243440133421 has 8 divisors (see below), whose sum is σ = 254066134464. Its totient is φ = 232817603040.

The previous prime is 243440133281. The next prime is 243440133439. The reversal of 243440133421 is 124331044342.

243440133421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243440133421 - 2⁹ = 243440132909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243440133481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 723811 + ... + 1005376.

It is an arithmetic number, because the mean of its divisors is an integer number (31758266808).

Almost surely, 2^243440133421 is an apocalyptic number.

It is an amenable number.

243440133421 is a deficient number, since it is larger than the sum of its proper divisors (10626001043).

243440133421 is a wasteful number, since it uses less digits than its factorization.

243440133421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1735331.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 243440133421 its reverse (124331044342), we get a palindrome (367771177763).

The spelling of 243440133421 in words is "two hundred forty-three billion, four hundred forty million, one hundred thirty-three thousand, four hundred twenty-one".